Section 207. If, before the matters so referred are determined, any arbitrator appointed by either party die, or

207. If, before the matters so referred are determined, any arbitrator appointed by either party die, or become incapable or refuse, or for seven days neglect, to act as arbitrator, the party by whom such arbitrator was appointed may nominate and appoint in writing some other person to act in his place; and if, for the space of seven days after notice in writing from the other party for that purpose, he fail to do so, the remaining or other arbitrator may proceed ex parte; and every arbitrator so substituted as aforesaid shall have the same powers and authorities as were vested in the former arbitrator at the time of such his death, refusal or disability as aforesaid. Appointment of umpire.